<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>测试发送消息</title>
</head>
<body>

<form action="/sendMsg" method="post">
    <p>消息体: <input type="text" name="msgBody"></p>
    <button type="submit">发送消息</button>
</form>
</body>
</html>